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As per the JetBlue name change policy, passengers are allowed to make changes to their PNR after ticketing. Additionally, the airline permits passengers to change their first- and last-name spellings; however, the changes must be made within character, and you must provide supporting documentation.
In addition, JetBlue only allowed one change per passenger. Thus, If the changes are requested multiple times, then the airline may charge a JetBlue name change fee. There are many rules and restrictions under this policy, to know in-depth details you can visit the JetBlue website or contact its customer service team.